CN112392700A - Micro fluid pump and pressure fluid application equipment - Google Patents

Abstract

Disclosed are a micro fluid pump and a pressure fluid application apparatus, the micro fluid pump including: a motor having a motor shaft extending along an axis; a main housing connected to the motor and defining an accommodating space; a diaphragm body mount coupled to the main housing, the diaphragm body mount having a diaphragm body with a plurality of diaphragm units disposed thereon; a crankshaft drive assembly that receives torque from the motor for rotation and is coupled to the diaphragm body to drive reciprocating compression and suction motions of the diaphragm unit; and the diaphragm body mounting seat is provided with a plurality of mounting concave parts corresponding to the diaphragm units respectively, the diaphragm units are supported on the mounting concave parts, and the mounting concave parts comprise bowl-shaped supporting parts and mounting holes arranged at the bottoms of the bowl-shaped supporting parts.

Description

Micro fluid pump and pressure fluid application equipment

Technical Field

The present invention relates to the field of fluid pumps, and more particularly to a micro fluid pump and a pressurized fluid application apparatus.

Background

With the widespread use of fluid pumps in both residential and commercial applications, increased demands have been placed on fluid pumps, particularly micro-fluid pumps.

Current micro fluid pumps (e.g., micro water pumps) generally include a motor, a main housing, a water bag mount, a water bag body having a plurality of water bag units, and a knee lever transmission assembly, wherein the water bag body is mounted on the water bag mount, and the water bag mount is provided with an avoiding portion to avoid an outer surface of a bag cavity of the water bag unit. In an operating state, the crank transmission assembly receives torque transmitted by the motor to rotate and drives the water bag unit on the water bag mounting seat to perform reciprocating compression and suction motions, so that fluid with preset pressure is output. However, on one hand, since the water bag unit is elastically deformed under high pressure, the volume of the water bag unit is increased, so that the pressure inside the water bag unit is reduced, the pressure of finally output fluid is influenced, and the performance and the output stability of the micro fluid pump are influenced; on the other hand, when the water bag unit has high pressure inside, the water bag unit generates large reverse pressure on the curved rod transmission assembly, the service life of the curved rod transmission assembly is damaged, and meanwhile, the performance of the micro fluid pump is also affected.

Therefore, there is a need for a micro fluid pump capable of outputting high pressure fluid, which has good performance and stability, and which has a long service life.

Disclosure of Invention

In view of the above problems, the present invention provides a micro fluid pump and a pressure fluid application apparatus. The micro fluid pump and the pressure fluid application equipment provided by the invention can effectively improve the performance and the stability of the fluid pump on the basis of well outputting high-pressure fluid, and the micro fluid pump has longer service life.

According to an aspect of the present invention, there is provided a micro fluid pump including: a motor having a motor shaft extending along an axis; a main housing connected to the motor and defining an accommodating space; a diaphragm body mount coupled to the main housing, the diaphragm body mount having a diaphragm body with a plurality of diaphragm units disposed thereon; a crankshaft drive assembly that receives torque from the motor for rotation and is coupled to the diaphragm body to drive reciprocating compression and suction motions of the diaphragm unit; and the diaphragm body mounting seat is provided with a plurality of mounting concave parts corresponding to the diaphragm units respectively, the diaphragm units are supported on the mounting concave parts, and the mounting concave parts comprise bowl-shaped supporting parts and mounting holes arranged at the bottoms of the bowl-shaped supporting parts.

The microfluidic pump according to the present invention may further comprise one or more of the following features, alone or in combination.

In some embodiments, the diaphragm unit includes a capsule cavity opened above and having a bowl shape, and a mounting post at a bottom of the capsule cavity, the mounting post passing through the mounting hole, and the capsule cavity being supported on the bowl-shaped support.

In some embodiments, the capsule cavity includes an arcuate thin-walled portion and a thickened bottom portion at which the mounting post is disposed, the bowl-like support supporting at least a portion of the arcuate thin-walled portion.

In some embodiments, the bowl support supports the arcuate thin wall portion.

In some embodiments, the diaphragm body mount is made of plastic, and the diaphragm body is made of rubber.

In some embodiments, the plurality of diaphragm units is three diaphragm units and the plurality of mounting holes is three mounting holes.

In some embodiments, the plurality of diaphragm units is four diaphragm units and the plurality of mounting holes is four mounting holes.

In some embodiments, the micro fluid pump further comprises: a valve seat sealingly coupled to a diaphragm body mount, the diaphragm body at least partially sandwiched between the diaphragm body mount and the valve seat; and wherein the diaphragm body mount is further provided with a plurality of first flanges respectively surrounding the mounting recesses and extending toward the valve seat, the valve seat being provided with a plurality of second flanges extending toward the diaphragm body mount at positions corresponding to the plurality of first flanges, the diaphragm unit being sandwiched between the respective first and second flanges.

According to another aspect of the present disclosure, a pressurized fluid application apparatus is provided, comprising a micro fluid pump as described above.

The pressure fluid application device according to the invention may further comprise one or more of the following features, alone or in combination.

In some embodiments, the device is a coffee maker.

In some embodiments, the coffee maker is an espresso maker.

In some embodiments, the device is a dental prophylaxis device.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts. The following drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.

FIG. 1 illustrates an exploded view of a micro fluid pump 100 according to an embodiment of the present disclosure;

FIG. 2A illustrates a perspective view of a micro fluid pump 100 according to an embodiment of the present disclosure;

FIG. 2B illustrates a cross-sectional view of the micro fluid pump 100, according to an embodiment of the present disclosure;

FIG. 3 illustrates a perspective view of a diaphragm body 160 according to an embodiment of the present disclosure;

FIG. 4 illustrates a partial view of diaphragm body mount 130 according to an embodiment of the present disclosure;

FIG. 5 illustrates a partial cross-sectional view of a diaphragm body 160 and a diaphragm body mount 130 according to an embodiment of the present disclosure;

FIG. 6 illustrates a perspective view of a valve seat 140 according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the disclosed embodiments without making any creative effort, also belong to the protection scope of the present invention.

As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.

Current micro fluid pumps (e.g., micro water pumps) generally include a motor, a main housing, a water bag mount, a water bag body having a plurality of water bag units, and a knee lever transmission assembly, wherein the water bag body is mounted on the water bag mount, and the water bag mount is provided with an avoiding portion to avoid an outer surface of a bag cavity of the water bag unit. The outer surface of the bag cavity is the surface of the bag cavity of the water bag unit facing the water bag seat. In an operating state, the crank transmission assembly receives torque transmitted by the motor to rotate and drives the water bag unit on the water bag mounting seat to perform reciprocating compression and suction motions, so that fluid with preset pressure is output.

However, on one hand, the water bag unit is elastically deformed under high pressure, and the volume of the water bag unit is increased, so that the pressure inside the water bag unit is reduced, the pressure of finally output fluid is influenced, and the performance and the output stability of the micro fluid pump are influenced; on the other hand, when the water bag unit has high pressure inside, the water bag unit will generate large reverse pressure to the curved bar transmission assembly, which damages the service life of the curved bar transmission assembly and also affects the performance of the micro fluid pump.

Based on the above, the present application provides a fluid pump and a pressure fluid application device, so that the performance and stability of the fluid pump are effectively improved on the basis of outputting high-pressure fluid well, and the micro fluid pump has a long service life.

According to an aspect of the present disclosure, a micro fluid pump is presented. Fig. 1 shows an exploded view of a micro fluid pump 100 according to an embodiment of the present disclosure.

Referring to fig. 1, the micro fluid pump 100 includes, for example, a motor 110, a main housing 120, a diaphragm body mount 130, and a crank drive assembly 170.

The motor 110 has a motor shaft extending along an axis, which is a rotation axis of the motor. Embodiments of the present disclosure are not limited by the rotational speed of the motor and its motor type.

The main housing 120 is connected to the motor 110 and defines an accommodating space, which is a space for accommodating internal components of the main housing, such as a crank gear assembly. The embodiments of the present disclosure are not limited by the specific structure of the accommodating space and the position thereof.

Fig. 2A illustrates a perspective view of the micro fluid pump 100 according to an embodiment of the disclosure, and fig. 2B illustrates a cross-sectional view of the micro fluid pump 100 according to an embodiment of the disclosure.

Referring to fig. 2A and 2B, the diaphragm mount 130 is coupled to the main housing 120. The diaphragm body mount 130 is coupled to the main housing 120, for example, via a snap fit, or it may be otherwise coupled to the main housing. Embodiments of the present disclosure are not limited by the manner in which the diaphragm body mount 130 is coupled to the main housing 120.

With continued reference to FIG. 1, the diaphragm body mount 130 is provided with a diaphragm body 160 having a plurality of diaphragm elements 161 (diaphragm elements 161 are shown in FIG. 3). For example, the diaphragm body 160 may be, for example, a plurality of integrally formed water bladders (e.g., upper openings), wherein each water bladder is a diaphragm unit.

A bell crank drive assembly 170 receives torque from the motor 110 for rotation and is coupled to the diaphragm body 160 to drive the reciprocating compression and pumping motion of the diaphragm unit. The crank transmission assembly 170 may be disposed inside the main housing, i.e. in the accommodating space.

For example, the knee lever transmission assembly 170 may further include: an eccentric 171 provided with an eccentric hole, an eccentric shaft 172 inserted in the eccentric hole of the eccentric wheel (the eccentric shaft is disposed at an angle to the output shaft of the motor), and a crank bracket assembly 173 connected to the eccentric shaft, so that it can receive torque from the motor through the eccentric wheel and realize rotation based on the torque, and make the crank bracket assembly perform a repetitive extrusion swing motion based on the rotation of the eccentric wheel. However, it should be understood that the crank drive assembly may also include other components or have other compositions, such as a gear drive assembly 174, for example, to transfer the torque of the motor to the eccentric, depending on the actual requirements. Embodiments of the present disclosure are not limited by the specific manner of construction of the bell crank drive assembly, so long as the bell crank drive assembly is capable of driving the reciprocating compression and suction movements of the diaphragm unit based on the torque received from the motor.

The reciprocating compression and suction motion is that the diaphragm units in the diaphragm body are alternately in a compression state and a stretching state. For example, if the diaphragm body is a water bag body including a plurality of water bag units, when the knee lever bracket assembly moves downwards and pulls down the water bag units, the water bag units are in a pumping movement process, the air pressure in the water bag units is reduced, and fluid enters the water bag units; on the contrary, when the knee lever bracket assembly moves upwards and presses the water sac unit, the water sac unit is in the compression movement process, the air pressure in the water sac unit rises, and therefore the fluid with high pressure is output.

FIG. 3 illustrates a perspective view of a diaphragm body 160 showing a diaphragm body unit 161, according to an embodiment of the present disclosure. FIG. 4 illustrates a partial view of diaphragm body mount 130 according to an embodiment of the present disclosure. Referring to fig. 3 and 4, the diaphragm body mounting seat 130 is provided with a plurality of mounting recesses 131 corresponding to the plurality of diaphragm units 161 of the diaphragm body 160. The mounting recess 131 is a portion of the diaphragm body mount for contacting the diaphragm unit to effect assembly of the diaphragm body to the diaphragm body mount.

FIG. 5 illustrates a partial cross-sectional view of a diaphragm body 160 and a diaphragm body mount 130 according to an embodiment of the present disclosure. Referring to fig. 4 and 5, the diaphragm unit 161 of the diaphragm body 160 is supported by the mounting recess 131 of the diaphragm body mounting seat 130, and the mounting recess 131 includes a bowl-shaped support portion 132 and a mounting hole 133 provided at the bottom of the bowl-shaped support portion 132. The bowl-shaped support 132 is a support section having a bowl-shaped arc surface in the mounting recess 131.

For example, the mounting hole may have a circular shape, for example, or may also have an elliptical shape. The diameter of the mounting hole can be set according to actual needs, for example.

It should be understood that, according to actual needs, the micro fluid pump 100 may further include, for example, a valve seat 140, an upper cover 150 or other components, and as shown in fig. 2A and 2B, the upper cover 150, the valve seat 140, the diaphragm body mounting seat 130, the main housing 120 and the motor 110 are hermetically mounted in sequence, for example, from top to bottom.

Based on the above, in the present application, the mounting concave portion provided with the diaphragm body mounting seat has the bowl-shaped supporting portion and the mounting hole provided at the bottom of the bowl-shaped supporting portion, and compared with the technical scheme that the avoiding portion is provided in the diaphragm body mounting seat to avoid the outer surface of the bladder cavity of the diaphragm unit, by providing the bowl-shaped supporting portion in the present application, when the micro fluid pump is in the operating state, the problem that the diaphragm unit of the diaphragm body is elastically expanded due to the high pressure inside the diaphragm unit and the pressure inside the diaphragm unit is reduced is prevented, so that the pressure of the fluid output by the micro fluid pump can be effectively increased, the operating performance of the micro water pump is improved, the output stability of the micro fluid pump is also improved, and the micro fluid pump can continuously and stably output the high-pressure (for example, 10 bar pressure) fluid. Simultaneously, through setting up bowl form supporting part, when operating condition, this bowl form supporting part can bear the backpressure who comes from diaphragm unit (its inside has the high pressure) to reduce high-pressure diaphragm unit effectively and to the backpressure of curved bar bracket component, improved the atress condition of curved bar bracket component, also improved miniature fluid pump's life.

In some embodiments, referring to fig. 5, the diaphragm unit 161 includes a bladder cavity 1611 and a mounting column 1612 at the bottom of the bladder cavity, the bladder cavity 1611 is open above and is bowl-shaped, the mounting column 1612 passes through the mounting hole 133, and the bladder cavity 1611 is supported on the bowl-shaped support 132.

The capsule cavity is a section of the diaphragm unit for containing fluid, and the mounting column is a section of the diaphragm unit for realizing assembly with the diaphragm body mounting seat. The mounting post may be cylindrical or prismatic, for example, and embodiments of the present disclosure are not limited by the particular configuration of the mounting post.

The capsule cavity may be made of an elastic material, for example rubber, or it may be made of other materials. Embodiments of the present disclosure are not limited by the specific materials of construction of the capsule cavity.

The capsule chamber may be supported, for example, only partially on the bowl-shaped support, or the capsule chamber may be supported entirely on the bowl-shaped support. Embodiments of the present disclosure are not limited by the specific area of engagement of the capsule cavity with the bowl support and the area of engagement thereof.

Based on the above, through setting up this diaphragm unit including the sack cavity that is the bowl form and the erection column that is located sack cavity bottom for the bowl form supporting part of installation concave part can with the good adaptation of corresponding diaphragm unit's sack cavity in the diaphragm body mount pad, thereby realize the support to this diaphragm unit's sack cavity better, and be favorable to further improving miniature pump's high-pressure output performance and stability.

With further reference to fig. 5, in some embodiments, the capsule cavity 1611 of the diaphragm unit 161 includes an arcuate thin-walled portion 1611A and a thickened bottom portion 1611B, the mounting post 1612 is disposed at the thickened bottom portion 1611B, and the bowl-like support 132 supports at least a portion of the arcuate thin-walled portion 1611A.

The thickened bottom is the section of the diaphragm unit capsule cavity having a thickness greater than the arcuate thin-walled portion, and embodiments of the present disclosure are not limited by the particular thickness values employed for the thickened bottom.

The bowl support 132 may be described in greater detail as supporting at least a portion of the curved wall 1611A. For example, the bowl-shaped support portion 132 supports only half of the arc-shaped thin wall portion 1611A, or a section of a quarter of the arc-shaped thin wall portion, for example. Alternatively, the bowl-shaped support portion 132 may support the entire arc-shaped thin wall portion 1611A.

Based on the above, on the one hand, including arc thin wall portion and bodiness bottom through the bag cavity that sets up this diaphragm unit for the part that this bag cavity is connected with the erection column has better resistance to compression and tensile strength, is favorable to improving diaphragm unit self life and intensity, and is favorable to preventing this bag cavity by wearing and tearing effectively at the diaphragm unit in-process that carries out reciprocal compression and suction motion. On the other hand, at least one part of the arc-shaped thin wall part is supported by the bowl-shaped supporting part, so that the elastic expansion of the capsule cavity under high pressure can be effectively prevented, the reverse pressure of the capsule cavity under high pressure is borne, the stress condition of the curved rod transmission assembly is improved, and the output of high-pressure fluid is ensured.

In some embodiments, the bowl support supports the arcuate thin wall portion. The arc-shaped thin-wall part is supported by the bowl-shaped supporting part, so that elastic expansion of all sections of the arc-shaped thin-wall part of the bag cavity under high pressure can be better prevented, the reverse pressure of the bag cavity under high pressure can be better borne, the stress condition of the curved rod transmission assembly is improved, and high-pressure fluid can be continuously and stably output.

In some embodiments, the diaphragm body mount is made of plastic, and the diaphragm body is made of rubber. Through setting up this diaphragm body mount pad and this diaphragm body and be plastic and rubber material respectively for the diaphragm body mount pad that the rigid material that has great intensity and rigidity made can well bear the diaphragm body that has less intensity and rigidity, thereby realizes the good joint between the two. And the diaphragm body can be alternately in a compression state and a stretching state in the process of reciprocating compression and suction movement by adopting the elastic rubber material, so that the suction of the fluid and the output of the high-pressure fluid are well realized.

In some embodiments, the plurality of diaphragm units is three diaphragm units and the plurality of mounting holes is three mounting holes. By arranging the three diaphragm units, the high-pressure fluid output of the micro fluid pump can be better realized, and the performance of the micro fluid pump is improved.

In some embodiments, referring to fig. 1, the plurality of diaphragm units is four diaphragm units and the plurality of mounting holes is four mounting holes. The four diaphragm units are arranged, so that high-pressure fluid output of the micro fluid pump can be better realized, and the performance of the micro fluid pump is improved.

In some embodiments, referring to fig. 1, the micro fluid pump further comprises a valve seat 140. The valve seat 140 is sealingly coupled to the diaphragm body mount 130, and the diaphragm body 160 is at least partially sandwiched between the diaphragm body mount 130 and the valve seat 140.

FIG. 6 illustrates a perspective view of a valve seat 140 according to an embodiment of the present disclosure. Referring to fig. 4 and 6, the diaphragm body mount 130 is further provided with a plurality of first flanges 134 respectively surrounding the mounting recesses 133 and extending toward the valve seat, the valve seat 140 is provided with a plurality of second flanges 144 extending toward the diaphragm body mount 130 at positions corresponding to the plurality of first flanges 134, and the diaphragm units are sandwiched between the respective first and second flanges 134 and 144.

For example, the diaphragm body mount and the valve seat may both be made of a rigid material, e.g. a plastic material, and the diaphragm body may for example be made of a rubber material, so that a less rigid rubber material can be well clamped in the diaphragm body mount and the valve seat having a higher stiffness and rigidity.

For example, the first and second flanges may have a circular shape, or they may have an elliptical shape. It should be understood that embodiments of the present disclosure are not limited by the particular configurations of the first and second flanges.

Based on the above, by providing the diaphragm body mount with the plurality of first flanges that respectively surround the mounting recesses and extend toward the valve seat, and providing the valve seat with the plurality of second flanges that extend toward the diaphragm body mount at positions corresponding to the plurality of first flanges, it is possible to sandwich the diaphragm unit between the corresponding first flanges and second flanges, thereby enabling a hard-to-soft seal structure to be achieved, and achieving good sealing between the valve seat, the diaphragm body, and the diaphragm body mount.

According to another aspect of the present disclosure, a pressure fluid application apparatus is provided that includes a micro fluid pump as described above and is capable of having the functions and advantages as described above.

In some embodiments, the device is a coffee maker. The coffee machine may be, for example, an espresso machine, or it may also be an american coffee machine, or it may also be another type of coffee machine. Embodiments of the present disclosure are not limited by the particular type of coffee maker.

In some embodiments, the coffee maker is an espresso maker. By using the micro fluid pump, the coffee machine can stably and continuously output fluid with the pressure of about 10 bar, so that pure espresso coffee can be brewed, and the espresso coffee machine has good performance.

In some embodiments, the device is a dental prophylaxis device. The fluid pressure applying device may be, for example, a household dental prophylaxis device, or it may also be a medical dental prophylaxis device. Embodiments of the present disclosure are not limited by the field of application of the dental rinser.

This application uses specific words to describe embodiments of the application. Reference to "a first/second embodiment," "an embodiment," and/or "some embodiments" means a feature, structure, or characteristic described in connection with at least one embodiment of the application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The foregoing is illustrative of the present invention and is not to be construed as limiting thereof. Although a few exemplary embodiments of this invention have been described, those skilled in the art will readily appreciate that many modifications are possible in the exemplary embodiments without materially departing from the novel teachings and advantages of this invention. Accordingly, all such modifications are intended to be included within the scope of this invention as defined in the claims. It is to be understood that the foregoing is illustrative of the present invention and is not to be construed as limited to the specific embodiments disclosed, and that modifications to the disclosed embodiments, as well as other embodiments, are intended to be included within the scope of the appended claims. The invention is defined by the claims and their equivalents.

Claims (12)

1. A micro fluid pump comprising:

a motor having a motor shaft extending along an axis;

a main housing connected to the motor and defining an accommodating space;

a diaphragm body mount coupled to the main housing, the diaphragm body mount having a diaphragm body with a plurality of diaphragm units disposed thereon;

a crankshaft drive assembly that receives torque from the motor for rotation and is coupled to the diaphragm body to drive reciprocating compression and suction motions of the diaphragm unit;

and the diaphragm body mounting seat is provided with a plurality of mounting concave parts corresponding to the diaphragm units respectively, the diaphragm units are supported on the mounting concave parts, and the mounting concave parts comprise bowl-shaped supporting parts and mounting holes arranged at the bottoms of the bowl-shaped supporting parts.

2. The micro fluid pump as claimed in claim 1, wherein the diaphragm unit comprises a bladder cavity opened at an upper portion thereof and having a bowl shape, and a mounting post at a bottom of the bladder cavity, the mounting post passing through the mounting hole, and the bladder cavity being supported on the bowl-shaped supporting portion.

3. The micro fluid pump as claimed in claim 1, wherein the bladder cavity comprises an arcuate thin-walled portion and a thickened bottom portion, the mounting post being disposed at the thickened bottom portion, the bowl-shaped support supporting at least a portion of the arcuate thin-walled portion.

4. The microfluidic pump of claim 3 wherein the bowl support supports the arcuate thin wall portion.

5. The micro fluid pump of claim 1, wherein the diaphragm body mount is plastic and the diaphragm body is rubber.

6. The micro fluid pump of claim 1, wherein the plurality of diaphragm units is three diaphragm units and the plurality of mounting holes is three mounting holes.

7. The micro fluid pump of claim 1, wherein the plurality of diaphragm units is four diaphragm units and the plurality of mounting holes is four mounting holes.

8. The micro fluid pump of claim 1, further comprising:

a valve seat sealingly coupled to a diaphragm body mount, the diaphragm body at least partially sandwiched between the diaphragm body mount and the valve seat;

and wherein the diaphragm body mount is further provided with a plurality of first flanges respectively surrounding the mounting recesses and extending toward the valve seat, the valve seat being provided with a plurality of second flanges extending toward the diaphragm body mount at positions corresponding to the plurality of first flanges, the diaphragm unit being sandwiched between the respective first and second flanges.

9. A pressure fluid application apparatus comprising a micro fluid pump as claimed in any one of claims 1 to 8.

10. The device of claim 9, wherein the device is a coffee maker.

11. The apparatus of claim 10, wherein the coffee maker is an espresso maker.

12. The apparatus of claim 9, wherein the apparatus is a dental prophylaxis device.

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